Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.naic.edu/~astro/RXstatus/Xband/RX_xband.shtml
Дата изменения: Unknown Дата индексирования: Mon Feb 4 05:54:30 2013 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п |
To leave the frames behind, click here
X Band
Basic Information | Calibration & Beam Parameters RFI Situation Recent Events Receiver History Contact Info |
Frequency Range (GHz): |
7.8 - 10.2*
|
Name and Number:
X-Band (cb,11)
|
Measured Sensitivity (K/Jy):
|
2.3 - 5.5 (8.5 GHz)
| 2.3 - 5.5 (8.8 GHz) 2.3 - 5.5 (9.0 GHz) 2.0 - 5.5 (9.2 GHz)**
Measured System Temp (K):
|
28 - 30 (8.5 GHz)
| 28 - 31 (8.8 GHz) 30 - 31 (9.0 GHz) 30 - 32 (9.2 GHz)**
Native Polarization:
|
Dual Circular***
|
Beam Size (9.0 GHz):
|
30 x 34 (arcsec)
|
Available Filters:
|
N/A
|
Warnings and Important Notes:
|
Resonances
click here |
|
Tsys from 8.5 GHz to 10 GHz improved, new values are around 30 K.
2. Calibration & Beam Parameters:
Gain and Tsys | Cal Values | Beam Maps | Polarization | Misc. Info |
For more details of the X-Band performance as a function of zenith angle
click here.
More information on calibration
techniques can be found in "Note
relevant to Spectral Line User's"
.
For more info on the calibration
of the X-band receiver and other Arecibo receivers, go to Phil
Perrilat's home page .
The most recent cal values measurements
For more information about cals
click here.
Not available.
Not available.
To see an up-to-date plot of Tsys, just type tsys on your terminal after logging into Arecibo's computer network.
X-band suffers some Radio Frequency Interference (RFI), which is believed to be due to aircraft communications. Daily RFI monitoring plots for the past several years from the Observatory "hill-top" monitoring system can be found in binders in the telescope Control Room.
For the most recent history of the X-Band receiver, click here.
For a full history of the X-Band receiver, click here.
For further information on this receiver, please contact Robert Minchin at